"In this tiny ebook I'm going to show you how to get started writing 6502 assembly language. [...] I think it's valuable to have an understanding of assembly language. Assembly language is the lowest level of abstraction in computers - the point at which the code is still readable. Assembly language translates directly to the bytes that are executed by your computer's processor. If you understand how it works, you've basically become a computer magician." More of this, please.

Mobile tech is typically counted as embedded ...overall, not very prominent - who knows really what ends up where, on large scale.

Sure, ARM11 is no longer dominant in ~top smartphones like it was for some time, But it didn't disappear, continues to be used in many mass-market devices - many lower-end Android phones are still built around ARM11-based Qualcomm or Mediatek SoCs ...quite possibly still most Android phones (it's just that tons of cheap Chinese devices aren't really noticeable in few most visible "premium" markets, but they largely power the worldwide Android adoption). Then add so called "feature phones" or Nokia Symbian devices, also most recent. It's not impossible that most smartphones and/or mobile phones in general still ship with ARM11.
Which reminds me, there's more than the main CPU - radio modules typically have some older ARM, and will likely continue that trend.
Also, Nintendo 3DS seems to have ARM11.

And that's only the visible stuff. My quite recent wifi router has some old ARM core - not sure which, but the point is: older cores continue being attractive for most scenarios.